Questions tagged as 'arduino'

Tagged questions
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problem with the bluethooth socket

Hi, I'm trying to send data from an android phone to an arduino via an hc-05 when I make the first send after restarting the arduino the transmission works correctly but the following transmissions generate the following log:    02-12 20:...
asked by 12.02.2018 / 20:33
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Problem with INTERRUPT when using multiswitch with arduino

I wanted to ask about the INTERRUPT. I have a multiswitch and I want to read the signals through Arduino, they are 9 signals, one start and the other control. But I have a problem, the signals are read perfectly, they are also stored in a mat...
asked by 06.02.2016 / 14:43
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how to define the ports in Arduino from assembler language?

I am trying to learn Arduino programming in assembler, using as an Arduino UNO R3 board and based on the examples of this tutorial: link I have managed to assemble and record the blink of the first example, which lights an LED connected to...
asked by 03.05.2017 / 22:10
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Arduino AREF flashes

I have a very simple php code with two buttons, one to turn on and another to turn off the led. A very simple arduino code, too. My problem is, using the arduino ide console the program goes well, without failures, but when it comes to con...
asked by 25.09.2018 / 17:40
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Call with Arduino Sim900

Hello Good afternoon, I have tried the SIM900 and I have only managed to send messages but it does not make the call, here my code #include <SoftwareSerial.h> // Configure software serial port SoftwareSerial SIM900(7, 8); void setup...
asked by 26.08.2018 / 00:02
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'DHT11' was not declared in this scope

#include "DHT.h" #include <Arduino.h> #define DHTPIN D1 #define DHTTYPE DHT11 #define LED D4 #define LED2 D8 #define LED3 D7 DHT dht(DHTPIN, DHTTYPE); void setup() { Serial.begin(9600); dht.begin(); pinMode (LED, OUTPUT); pinMode (LED2...
asked by 20.04.2018 / 06:24
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Problem with Node RED

I am connecting an Arduino through MQTT to Node RED. This arduino sends me the following string "Temperature: 28.0". Then I have another plate that gets the humidity and dows it in the form of string "Humidity: 50". When receiving data by Node R...
asked by 05.06.2017 / 01:42
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Use nodemcu to send data from pulse sensor

I am trying to send the collected data from a pulse sensor PulseSensor , but the code is addressed to the Arduino board and not to the NodeMCU board, this example Example NodeMCU (in this case I would use Firebase ) did not work either, since...
asked by 20.02.2017 / 14:43
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after end of result set JAVA-MySQL

In the following code I try to make 2 buttons from Arduino send only 1 or 2 and when it reaches java if I press 1 with the help of MySQL it will delete only one number and if I press 2 it will add more products. My doubt is that I can not find w...
asked by 11.12.2018 / 07:49
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Problem with library FS.h Error "ets Jan 8 2013, rst cause: 2, boot mode: (3,7) ets_main.c" # 5466

Esimates I have a Nodemcu 1.0 V3 CH340 - when using the example of the Arduino IDE ESP8266 / ConfigFile of the Arduino IDE I load the program with "ESP8266 Scketch Data Upload" (according to instructions of link ) - with the corresponding file"...
asked by 10.12.2018 / 04:43